Circular shelf



FIG. 1 is a perspective view of a circular shelf according to an embodiment of the present invention;

FIG. 2 is a front plan view of the circular shelf shown in FIG. 1;

FIG. 3 is a right side plan view of the circular shelf shown in FIG. 1, the left side plan view is a mirror image of the right side plan view;

FIG. 4 is a top plan view the circular shelf shown in FIG. 1; and,

FIG. 5 is a bottom plan view the circular shelf shown in FIG. 1.

The broken lines shown herein form no part of the claimed design. 

The ornamental design for a circular shelf, as shown and described. 